Security of quantum key distribution with source and detector imperfections through phase-error estimation
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912465730666496 |
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| author | Currás-Lorenzo, Guillermo Pereira, Margarida Nahar, Shlok Tupkary, Devashish |
| author_facet | Currás-Lorenzo, Guillermo Pereira, Margarida Nahar, Shlok Tupkary, Devashish |
| contents | Quantum key distribution (QKD) promises information-theoretic security based on quantum mechanics, but practical implementations face security vulnerabilities due to device imperfections. Recent advances have separately addressed source and detector imperfections in phase-error-estimation based security proof frameworks, but this is not enough to protect real-world QKD systems suffering from both types of imperfections simultaneously. In this work, we show that existing techniques for BB84-type protocols can be combined to construct a unified security proof that simultaneously accounts for both source and detector imperfections. Our approach thus represents a significant step towards closing the gap between theoretical security proofs and practical QKD implementations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_03549 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Security of quantum key distribution with source and detector imperfections through phase-error estimation Currás-Lorenzo, Guillermo Pereira, Margarida Nahar, Shlok Tupkary, Devashish Quantum Physics Quantum key distribution (QKD) promises information-theoretic security based on quantum mechanics, but practical implementations face security vulnerabilities due to device imperfections. Recent advances have separately addressed source and detector imperfections in phase-error-estimation based security proof frameworks, but this is not enough to protect real-world QKD systems suffering from both types of imperfections simultaneously. In this work, we show that existing techniques for BB84-type protocols can be combined to construct a unified security proof that simultaneously accounts for both source and detector imperfections. Our approach thus represents a significant step towards closing the gap between theoretical security proofs and practical QKD implementations. |
| title | Security of quantum key distribution with source and detector imperfections through phase-error estimation |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2507.03549 |